/*
 * The MIT License
 * 
 * Copyright (c) 2011 Takahiro Hashimoto
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package com.taobao.top.link.embedded.websocket.handler;

import static com.taobao.top.link.embedded.websocket.util.PacketDumpUtil.FR_DOWN;
import static com.taobao.top.link.embedded.websocket.util.PacketDumpUtil.FR_UP;
import static com.taobao.top.link.embedded.websocket.util.PacketDumpUtil.HS_DOWN;
import static com.taobao.top.link.embedded.websocket.util.PacketDumpUtil.HS_UP;

import java.nio.ByteBuffer;

import com.taobao.top.link.embedded.websocket.WebSocket;
import com.taobao.top.link.embedded.websocket.exception.WebSocketException;
import com.taobao.top.link.embedded.websocket.frame.Frame;
import com.taobao.top.link.embedded.websocket.util.PacketDumpUtil;

/**
 * Packet Dump Utility
 * 
 * <pre>
 * Dump mode:
 * HS_UP  : dump buffer of handshake upstream
 * HS_DOWN: dump buffer of handshake downstream
 * FR_UP  : dump buffer of frame upstream
 * FR_DOWN: dump buffer of frame downstream
 * ALL    : dump these streams
 * </pre>
 * 
 * .
 *
 * @author t-hashimoto
 */
public class PacketDumpStreamHandler implements StreamHandler {

  /** The log. */
  // private Logger log =
  // Logger.getLogger(PacketDumpStreamHandler.class.getName());

  /**
   * Instantiates a new packet dump stream handler.
   */
  public PacketDumpStreamHandler() {
  }

  /*
   * (non-Javadoc)
   * 
   * @see jp.a840.websocket.handler.StreamHandler#nextDownstreamHandler(jp.a840.
   * websocket.WebSocket, java.nio.ByteBuffer, jp.a840.websocket.frame.Frame,
   * jp.a840.websocket.handler.StreamHandlerChain)
   */
  public void nextDownstreamHandler(WebSocket ws, ByteBuffer buffer, Frame frame, StreamHandlerChain chain) throws WebSocketException {
    if (PacketDumpUtil.isDump(ws, FR_DOWN)) {
      PacketDumpUtil.printPacketDump("FR Downstream", buffer);
    }
    chain.nextDownstreamHandler(ws, buffer, frame);
  }

  /*
   * (non-Javadoc)
   * 
   * @see
   * jp.a840.websocket.handler.StreamHandler#nextHandshakeDownstreamHandler(jp
   * .a840.websocket.WebSocket, java.nio.ByteBuffer,
   * jp.a840.websocket.handler.StreamHandlerChain)
   */
  public void nextHandshakeDownstreamHandler(WebSocket ws, ByteBuffer buffer, StreamHandlerChain chain) throws WebSocketException {
    if (PacketDumpUtil.isDump(ws, HS_DOWN)) {
      PacketDumpUtil.printPacketDump("HS Downstream", buffer);
    }
    chain.nextHandshakeDownstreamHandler(ws, buffer);
  }

  /*
   * (non-Javadoc)
   * 
   * @see
   * jp.a840.websocket.handler.StreamHandler#nextHandshakeUpstreamHandler(jp.
   * a840.websocket.WebSocket, java.nio.ByteBuffer,
   * jp.a840.websocket.handler.StreamHandlerChain)
   */
  public void nextHandshakeUpstreamHandler(WebSocket ws, ByteBuffer buffer, StreamHandlerChain chain) throws WebSocketException {
    if (PacketDumpUtil.isDump(ws, HS_UP)) {
      PacketDumpUtil.printPacketDump("HS Upstream", buffer);
    }
    chain.nextHandshakeUpstreamHandler(ws, buffer);
  }

  /*
   * (non-Javadoc)
   * 
   * @see jp.a840.websocket.handler.StreamHandler#nextUpstreamHandler(jp.a840.
   * websocket.WebSocket, java.nio.ByteBuffer, jp.a840.websocket.frame.Frame,
   * jp.a840.websocket.handler.StreamHandlerChain)
   */
  public void nextUpstreamHandler(WebSocket ws, ByteBuffer buffer, Frame frame, StreamHandlerChain chain) throws WebSocketException {
    if (PacketDumpUtil.isDump(ws, FR_UP)) {
      PacketDumpUtil.printPacketDump("FR Upstream", buffer);
    }
    chain.nextUpstreamHandler(ws, buffer, frame);
  }

}
